It goes into "overdrive" because it's not really doing anything, so it probably goes at like thousands of fps. As for not drawing anything, what location is your camera at? At a z value of 0, if you're in the default position it's going to be behind the near plane of the projection matrix. (unless you're using an orthographic projection) If you make the z value something like -5, you should be able to see something. However, IIRC the default point size is 1, which will equate to 1 pixel, so it will be very small.